Fuel control valve for diesel engines



Nov. 28, 1944. R. J. DEVORAK FUEL CONTROL VALVE FOR DIESEL ENGINES Filed Sept. 25, 1943 4 Sheets-Shet l Inventor Jag/mend :Z'Febaravf 4/ By a? m and may Mite) Nov. 28, 1944. J DEVQRAK I 2,363,576 I FUEL CONTROL VALVE FOR DIESEL ENGINES Filed Sept. 25', 1945 4 Sheets-Shegt 2 flylflond ezi-afdaid M Nov. 28; 1944. R, J; DEVORAK 2,363,576

FUEL CONTROL VALVE FOR DIESEL ENGINES Filed Sept. 25, 1943 4 Sheets-Sheet 3 Patented Nov. 28, 1944 FUEL oos'raor. VALVE Foa msssr. ENGINES Raymond John Devorak, Minneapolis, Minn.

Application September 25, 1943, Serial No. 503,801

3 Claims.

The present invention. relates to new and useful improvements in fuel control valves for Diesel engines, and has for one of its important objects to provide, in a manner as hereinafter set forth, a device of this character comprising a novel construction, combination and arrangement of disks, wherebythe volume of fuel injected into each cylinder may be kept uniform and regulated as desired.

Another very important object of the invention is to provide a disk-type fuel control or measuring valve of the aforementioned character which may be automatically adjusted by the suction or vacuum in the intake manifold of the engine for advancing or retarding the fuel injections to meet various conditions as they develop.

Other objects of the invention are to provide a disk-type fuel measuring or control valve of the character described for Diesel engines, which valve will be comparatively simple in construction, strong, durable, highly efliclent and reliable in operation, compact, and which ma be manufactured at low cost.

All of the foregoing, and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is an elevational view of a valve constructed in accordance with the present invention.

Figure 2 is a viewin front elevation of the device.

Figure 3 is a rear elevational view.

Figure 4 is a longitudinal sectional view through the valve.

Figure 5 is a cross-sectional .view, taken substantially on the line 5- of Figure 4.

Figure 6 is a cross-sectional view, taken substantially on the line 8-4 of Figure 4.

Figure '7 is a fragmentary view in cross-section, taken substantially on the line 1-1 of Figure 4.

Figure 8 is a fragmentary view in section through the disk assembly.

Figure 9 is a detail view in perspective of the eccentric gear adjusting bushing.

Figure 10 is a fragmentary view in cross-section through a portion of the housing and the slidable follower.

Figure 11 is a cross-sectional view, taken substantially on the line I l--l l ofFlgure 4.

therewith in the housing I.

Figure 12 is a plan view of the measuring disk adjusting sleeve.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a cylindrical sectional housing of suitable dimensions which is designated generally by reference numeral l. Bolts 2 detachably secure the sections of the housing I together. Extending longitudinally into the housing I through the forward end 3 thereof is a centrally located drive shaft l. The drive shaft 4 is journaled in adjustable roller bearings 5 which are provided therefor on the front I of the housing I. The drive shaft, it will be observed, terminates at a point adjacent the back or rear end 0 of the housing I.

The front end I of the housing I ha formed therein outlet openings I for receiving fuel lines to the injection nozzles in the cylinders of the engine. Bolts 8 in the front end 3 of the housingl rigidl secure a stationary disk or plate 2 in this end portion of said housing. Passages Ill in the plate 9 communicate with the outlets 1. Inner and outer tubes II and ILrespectively, are mounted on the drive shaft 4 for rotation The outer tube =l2 includes a closed rear end I: which is fixed on the corresponding end portion of the shaft 4 for driving said tube from said shaft. Fuel distributing and measuring disks l4 and I5 are provided on the forward end portions of the tubes H and l2,'respectively, said disks being in face abutting contact with each other. Each disk l4 and II has formed therein a circumferentially extending slot It. The slots l6 communicate with each other. I

A sleeve "is splined on the rear end portion of the outer tube l2. Pins I! are mounted on the inner tube II and are engaged in cam slots I! which are provided therefor in the sleeve I'I. Openings 20 (see Fig. 6) in the outer tube l2 accommodate the pins l8. A throttle control rod 2| extends slidably through the back 8 of the housing I and is operatively connected to the sleeve II by a fork 22. A circumferential channel 23 in the rear end portion of the sleeve Il accommodates the fork 22.

The drive shaft 4 rotates in an injection timing disk 24 which is slidable on said shaft between the disk l4 and the plate 9. The tube l2 has slidably mounted thereon and is rotatable in an injection timing disk 25 which is in contact with the disk It. The disks 24 and 25, which are of greater diameter than the disks l4 and ii, are provided with peripheral gear teeth 28 (see Fig. 5) the purpose of which will be presently set forth.

A follower 2'! is splined for longitudinal sliding movement in the housing I and abuts the disk 25. In the embodiment shown, the follower 21 comprises front and back plates 28 and 29, respectively, which are secured together by bolts 30. Fluid actuated plungers 3| in the rear end portion of the housing .I are engaged with the follower 21 for urging said follower and the disk assembly forwardly in the housing against the stationary plate 9. The plungers 3| are operable in cylinders 32 which are to be connected to the fuel inlet line (not shown), thus utilizing the motor fuel as the actuating means for said follower. The face of the plate 23 of the follower 21 which abuts the plate 29 has formed therein an annular channel 33; Fuel passages 34 in the plate 23, which communicate with the channel 33, are aligned with the passages III in the stationary plate 9. A fuel inlet line 35, from the usual source of fuel under pressure, communicates with channel 33 and is connected to and suitably permits movement of the follower 21. For instance, the line 35 may include slidably telescoped sections, the movable section being connected to follower 21 to permit movement of the latter..

The injection timing disks 24 and 25 have formed in the faces thereof which are adjacent the members 9 and 28 circumferential grooves 36 which are in constant communica tion-with the passages Ill and 34. These disks 24 and 25 are further provided, at intermediate points in the grooves 33, with ports 31 with which the slots I6 are brought into communication as the disks l4 and I5 rotate.

Mounted for rotary adjustment in a bearing 38 which is provided therefor in the rear portion ofthe housing I- is an eccentric bushing 39. The bushing 39 includes a projecting rear end portion 40 which facilitates adjusting said bushing. A ring 4| is secured by bolts 42 on the rear end of the housing I and encircles the adjacent portion of the bushing 39, said 'ring being engaged with a flange 43 on the bushing for securing same in adjusted position.

A shaft 44 is-journaled in the bushing 39 and the follower 21, said follower being slidable on said shaft. A gear 45 on the forward end of the shaft 44 is engaged with the teeth 26 on the disks 24 and 25 for rotatably adjusting said disks in unison relative to the disks l4 and I 5 for timing the fuel injections. The shaft 44 may be connected in any suitable manner to the intake manifold of the engine for actuation by the suc-'- tion or vacuum therein for automatically adjusting the disks 24 and 25. Also, the shaft 44 may be manually actuated, if desired.

It is thought that the operation of the device will be readily apparent from a consideration of the foregoingl Briefly,'fuel enters the channel 33 from the line 35 and flows to the lines connected to the outlets ,1 as the slots IS in the rotating disks l4 and I5 move successively into communication with the ports '31 in the disks 24 and 25. As hereinbefore indicated, the shaft 4 drives the disks l4 and I5. Operation of the sleeve I1 longitudinally on the outer tube l2 with which said sleeve rotates rotatably adjusts the disk l4 relative to the disk l5 through the pins It for moving the slots it toward oraway from registry with each other, thus varying the capacity of said slots for controlling the volume of fuel flowing therethrough. Rotation of the disks 24 and 25 by the gear 43 advances or retards the ports 31 for controlling the timing of the fuel in- Jections. By rotating the eccentric bushing,

the gear 45 may be adjusted relative to the disks 24 and 25 to compensate for wear. An oil pressure line is to be connected at 46 to the housin8 41 of the bearings I for communication with ducts 48 in the drive shaft 4 for lubricating the moving parts.

It is believed that the many advantages of a valve constructed in accordance with the present invention will be readily understood, and

although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall with housing having outlets therein aligned. with the passages, disks mounted on the shaft for rotary adjustment relative to the latter, further rotary disks mounted on and rotatable with the shaft and operable between the first-named disks, means for actuating said follower to compact said disks, said first-named disks having ports therein communicating respectively with the passages and the outlets, the rotary disks having circumferential slots therein communicating with each other and communicating successively with the ports, means for rotatively adjusting the rotary 'disks relative to each other, and means for rotatably adjusting the first-named disks relative to the rotary disks and to restrain them from rotation with the shaft. p

2. A valve of the character described comprising a housing. a shaft rotatable in said housing, means to continuously rotate said shaft 9. follower slidable in the housing, a fuel line connected to the follower, said follower having passages therein communicating with the line, the housing having outlets therein aligned with the passages, disks mounted on the shaft for rotary adiustment relative to the latter, further rotary disks mounted on and rotatable with the shaft and operable between the first-named disks, means for actuating said follower to compact said disks, said first-named disks having ports .therein communicating respectively with the pasbeing fixed to said shaft for actuation thereby,

said outer tube having openings therein, a sleeve 'splined on the outer tube and'having can; slots therein, and pins on the inner tube operable in the openings and engaged in the slots for rotatlower slidable in the housing, a fuel line connected to the follower, said follower having pastherein communicating respectively with the -pas'- sages and the outlets, the-rotary disks having circumferential slots therein communicating with each other and communicating successively wit'h the ports, means for rotatably adjusting the rotary disks relative to each other, and means for rotatably adjusting the first-named disks relative to the rotary disks and to restrain them from rotation with the shaft, the last-named means including an eccentric bushing mounted for rotary adjustment in the housing, "a shaft rotatably mounted in said bushing, gear teeth on the peripheries of the stationary disks, and a gear on the second-named shaft engaged with said teeth.

RAYMOND JOHN DEVORAK. 

